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Lancaster Laboratories Page ] of2 <br /> Where gau�li y is a s "'V <br /> Qu ity Con rol Summary <br /> Client Name: Chevron Products Company Group Number 793122 <br /> Reported. 01/18/02 at 06:32 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCs LCSD LCs/LCSD <br /> Analysis Name Result MDL Units %ltEC 4REC L1mite RPD RPD Max <br /> Batch number 02014A55 Sample number(s) 3757250 <br /> Benzene N D 0 5 ug/l 94 99 80-118 5 30 <br /> Toluene N D 0 5 ug/l 99 104 82-119 5 30 <br /> Ethylbenzene N D 0 5 ug/l 101 107 81-119 6 30 <br /> Total Xylenes N D 1 5 ug/1 101 106 82-120 5 30 <br /> Methyl tert-Butyl Ether N D 2 5 ug/l 100 101- 79-127 1 30 <br /> TPH-GRO - Waters N D 50 ug/l 87 95 76-119 9 20 <br /> Batch number 02015A53 Sample number(s) 3757251-3757253 <br /> Benzene N D 0 5 ug/l 108 106 80-118 2 30 <br /> Toluene N D 0 5 ug/l 103 101 82-119 1 30 <br /> Ethylbenzene N.D 0 5 ug/l 106 104 81-119 1 30 <br /> Total Xylenes N D 1 5 ug/l 105 105 82-120 1 30 <br /> Methyl tert-Butyl Ether N ❑ 2 5 ug/l 98 99 79-127 1 30 <br /> TPH-GRO - Waters N D 50 ug/l 88 83 76-119 5 20 <br /> Batch number U020162AA Sample number(s) 3757253 <br /> Methyl t-butyl ether N D 2 ug/l 91 77-127 <br /> Sample Matrix Quality Control <br /> Ms MSD Ms/MSD RPD BCG DUP DUP DUP <br /> RPD <br /> Analysis Name %REC %REC Litaits RPD MAX Cone Cone RPD Max <br /> Batch number 02014A55 Sample number(s) 3757250 <br /> Benzene 101 66-140 <br /> Toluene 108 72-138 <br /> Ethylbenzene 111 71-138 <br /> Total Xylenes 109 69-140 <br /> Methyl tert-Butyl Ether 96 60-145 <br /> TPH-GRO - Waters 105 74-132 <br /> Batch number 02015A53 Sample number(s) 3757251-3757253 <br /> Benzene 110 66-140 <br /> Toluene 105 72-138 <br /> Ethylbenzene 109 71-138 <br /> Total Xylenes 108 69-140 <br /> Methyl tert-Butyl Ether 107 60-145 <br /> TPH--GRO - Waters 95 97 74-132 2 20 <br /> Batch number U020162AA Sample number(s) 3757253 <br /> Methyl t-butyl ether (2) (2) 69-134 4 30 <br /> Surrogate Quality Control <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ <br /> (2) The background result was more than four times the spike added <br /> Lancaster Laboratories Inc <br /> M E M B E R 2425 New Holland Pike <br /> ® PO Box 12425 <br /> Lancaster 11 <br /> 717-656 230000 Fax fax 7177 656 2681 2216 Rev 9/11/00 <br />